Leaf-spring.



R. N. CHAFFEE.

LEAF SPRING.

APPLICATION FlLED FEB. 2, I9I8.

Patented Oct. 15, 1918.

FOLIO NCHHFFEE affoz M211 rain.

ROLLO CHAFFEE, OF DULUTH, MINNESOTA.

LEAF-SPRINT G.

- Specification of Letters Patent.

Patented Get. 115, 1918.

Application filed February 2 1918. Serial No. 215,084.

To all whom it may concern;

Be it known that I, RoLLo N. CHAFFEE, a citizen of the United States, residing at Duluth, in the county of Ste Louis and State of Minnesota, have invented certain new and useful Improvements in Leaf-Springs, of which the following is a specification, reference being had to the accompanying drawings.

p This invention relates to certain improvements in leaf springs and it is an object of the invention to provide a novel and improved means whereby a spring of this type may be efiectively lubricated with conven ience and facility.

' Furthermore, it is an object of the invention to provide a novel and improved spring of this character wherein strips or inserts are applied between adjacent leaves or laminations and wherein each ofsaid strips or inserts is of a width in excess of the width of the leaves or laminations with which it coacts and wherein the side marginal portions of said strip or insert are formed to provide lubricant receiving channels to initially receive the oil or lubricant.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved leaf spring whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use,, as will be hereinafter more fully set forth.

The novel features of my invention will, hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein:

Figure l is a view in elevation of a leaf sprlng constructed in accordance with an embodiment .of my invention;

Fig. 2 is an enlarged transverse sectional piew {aken substantially on the line 22 of Fig. 3 is a fragmentary view in top plan of one of the inserts or strips as herein embodied; and y 1 Fig. 4 is a fragmentary view in top plan of an insert or strip constructed in accord ance .with a further embodiment of my in-.

vention. As disclosed in the accompanying drawmgsL denotes a leaf spring comprising a plurality of leaves or laminationsl and disposed betweeneach pair of adjacent leaves or laminations l is a metallic insert or strip 2 extending the entire length of the shorter lamination or leaf 1. The strip or insert 2 is of a widthin excess of the width of the leaves or laminations 1 between which it is interposed and the extended marginal portions thereof are upturned as at 3 to afford the oil receiving channels 4. If desired, a strip or cord 5 of felt or other absorbent material may be arranged within each of said channels 4.

As particularly illustrated in Figs. 2 and 3 the upper face of each of the strips or inserts 2 is provided with the inwardly directed grooves 6 terminating at substantially the transverse center of the strip or insert or if preferred the portion of the strip or insert 2 positioned between a pair of leaves or laminations of the spring may be provided with the openings 7 as particularly illustrated in Fig. 4.

With a leaf spring provided withvthe inserts or strips as hereinbefore set forth it will be self-evident that the oil applied. to the spring will be collected by the channels 4 and will, during. the operation of the spring pass inwardly whereby an efl'ectlve lubrication of the sprin is effected. While the form of invention 1 lustrated in Fig. 4 may be employed with facility to lubricate the opposed faces of adjacent leaves or laminations 1, I particularly desire to use the form illustrated in Figs. 2 and 3 wherein the grooves 6 are employed as it has been established-in actual practicethat it is of advantage and importance to maintain dry the lower face of the strip or insert 2 and the upper face of the leaf or laminatlon 1, immediatelytherebeneath and upon whichthe insert or lamination 2 rests. The slipping of the leaves or laminations 1 then occurs between the lower faces of the leaves or laminations 1 and the upper faces of the inserts or strips 2 and by means of the grooves 6 the necessary lubrication is as- It is also to be understood that the openings 7 as particularly illustrated in Fig. 4 maybe of such size, shape and may be placed in such position as may be found tobest meet the requirements of practice.

From the foregoing description it is thought to be obvious that a leaf spring constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and operated and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement andv formation of the several parts herein shown in carrying 4 out my invention in practice except as hereinafter claimed.

I claim:

-1. In combination with a leaf spring, an insert interposed between an adjacent pair of laminations of the spring, said insert being of a width in excess of said laminations and extending beyond opposite sides thereof, the extended portions of the insert being provided with oil receiving channels.

2. In combination with a leaf spring, an

insert interposed between an adjacent pair of laminations of the spring, said insert being of a width'in excess of said laminations and extending beyond a side thereof, the extended portion of the insert being provided with an oil receiving channel.

3. In combination with a leaf spring, an insert interposed between an adjacent pair of laminations of the spring, said insert be:

ing of a width in excessof said laminations and extending beyond opposite sides thereof, the extended portions of the insert.being provided with oil receiving channels, said insert being coextensive in length with the length of the shorter of the two laminations between which it is interposed.

. 4., In a new article of manufacture, a

lubricating insert adapted to be interposed between adjacent laminations of a leaf spring, said insert being of a' width to extend beyond a side of the spring when in applied position, said extended portion being provided with an oil receiving channel.

5. As a new article of manufacture, a lubricating insert adapted to be interposed between adjacent laminations of a leaf spring, said insertbeing of a width to extend beyond a .side of the spring when in applied position, said extended portion being provided with a flange to afford an oil receiving channel.

6. In a laminated spring, the combination of spring leaves, and an insert interposed between said spring leaves, said insert being of a width in excess of said leaves and extending transversely beyond the same, the extended portion of the insert being upturned to provide an oil receiving channel.

7. In a laminated spring, the combination of spring leaves, and an insert interposed between said leaves, said insert being of a width in excess of said leaves and extending transversely beyond opposite sides thereof, the extended portions of the insert being provided with upstanding flanges to afford oil receiving channels. 8. In a laminated leaf spring the combination of a pair of spring leaves, one of said leaves being shorter than the other, and an insert interposed between said leaves, said insert being of a width in excess of the adj acent'superposed leaf and extending beyond one side thereof, the extended portion of the insert being provided with an oil re- I ceiving channel, said insert being substantially coextensive-in length with the length of the shorter one of said leaves.

9. In a laminated leaf spring, the combination of superposed spring leaves, one of said leaves being shorter than a leaf adja cent thereto, and aninsert interposed between said shorter leaf and adjacent longer leaf, said insert being of greater width than the adjacent superposed leaf and extending beyond one. side thereof, the extended portion of the insert being provided with an upturned flange adapted in cooperation with the extended portion of the web-of said insert and the side of the adjacent superposed leaf to form an oil receiving channel, said insert extending approximately length of said adjacent shorter leaf.

In testimony whereof I hereunto afiix my signaturein the presence of two witnesses.

ROLLO N. OHAFFEE.

Witnesses:

GERTRUDE ToBnN, L. DORAN.

the entire 

